loop0: detected capacity change from 0 to 32768
BUG at fs/jfs/jfs_dmap.c:3045 assert(n < 4)
------------[ cut here ]------------
kernel BUG at fs/jfs/jfs_dmap.c:3045!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 3980 Comm: syz-executor.0 Not tainted 5.15.167-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:dbFindLeaf+0x4de/0x4e0 fs/jfs/jfs_dmap.c:3045
Code: fe e9 55 ff ff ff e8 f1 cc 9d fe 48 c7 c7 a0 39 c1 8a 48 c7 c6 e0 36 c1 8a ba e5 0b 00 00 48 c7 c1 60 44 c1 8a e8 32 95 50 07 <0f> 0b 55 41 57 41 56 41 55 41 54 53 48 83 ec 68 48 89 fb 49 be 00
RSP: 0018:ffffc90002d87998 EFLAGS: 00010246
RAX: 000000000000002b RBX: 00000000ffffffff RCX: 309ed586d052da00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 000000000000001d R08: ffffffff81668a3c R09: ffffed10172067a8
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000155
R13: 0000000000000002 R14: 0000000000000020 R15: 000000000000000a
FS:  00007f26f3d256c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055c7f563e950 CR3: 0000000022060000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 dbAllocDmapLev+0xcf/0x490 fs/jfs/jfs_dmap.c:2035
 dbAllocCtl+0x113/0x920 fs/jfs/jfs_dmap.c:1891
 dbAllocAG+0x28b/0x10b0 fs/jfs/jfs_dmap.c:1432
 dbDiscardAG+0x34e/0xa10 fs/jfs/jfs_dmap.c:1681
 jfs_ioc_trim+0x42f/0x660 fs/jfs/jfs_discard.c:100
 jfs_ioctl+0x2ac/0x3a0 fs/jfs/ioctl.c:132
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f26f49a3b29
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f26f3d250c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f26f4ac2f80 RCX: 00007f26f49a3b29
RDX: 0000000020000080 RSI: 00000000c0185879 RDI: 0000000000000004
RBP: 00007f26f49ef47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f26f4ac2f80 R15: 00007ffe86e3a6a8
 </TASK>
Modules linked in:
---[ end trace 4b96521726fbe3f6 ]---
RIP: 0010:dbFindLeaf+0x4de/0x4e0 fs/jfs/jfs_dmap.c:3045
Code: fe e9 55 ff ff ff e8 f1 cc 9d fe 48 c7 c7 a0 39 c1 8a 48 c7 c6 e0 36 c1 8a ba e5 0b 00 00 48 c7 c1 60 44 c1 8a e8 32 95 50 07 <0f> 0b 55 41 57 41 56 41 55 41 54 53 48 83 ec 68 48 89 fb 49 be 00
RSP: 0018:ffffc90002d87998 EFLAGS: 00010246
RAX: 000000000000002b RBX: 00000000ffffffff RCX: 309ed586d052da00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 000000000000001d R08: ffffffff81668a3c R09: ffffed10172067a8
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000155
R13: 0000000000000002 R14: 0000000000000020 R15: 000000000000000a
FS:  00007f26f3d256c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055c7f563e950 CR3: 0000000022060000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400